Line marker for tennis courts and the like



Jan. 29, 929.

J. M GAIN LINE MARKER FOR TENNIS COURTS AND THE LIKF Filed April 1, 1924 Patented Jan. 2%, 1929.

UNITED 5T JOHN MGGAIN, 0F MARRICKVILLE, NEAR SYDNEY, NEW SOUTH WALES, AUSTRALIA.

LINE MARKER FOB TENNIS COURTS AND THE LIKE. i 7

Application filed A ril 1, 1924, Serial No. 703,522, and in Australia April 19, 1923'.

to be lined. According to this invention the marking liquid is sprayed from a nozzle on to the ground, between two adjustable guiding discs or plates, the liquid being forced through the nozzle by means of compressed air whichis stored in a reservoir.-

Referring to the drawings which accompany and form part of this complete specification, 7 v

Fig. 1 is an elevation of the marker.

Fig. 2 is a plan of the marker.

Fig. 3 is a detail ofthe combination filler cap and non return valve. 7

Fig. 4: is a detail of the nozzle.

, Fig. 5 is a detailofthe nozzle disc.

Fig. 6 is a detail sectional view of the ad justable disks and their mounting means.

In Figs. 1 and 2, 6 is the frame work which may be constructed of tubular metal, wood or any other suitable material. Attached to the frame work 6 are two reservoir supports 7 and 8. The frame work is also provided with a handle 15 at its rear end, and with two depending arms 9 to which are attached the wheels 11 and 12. Fitted to the front of this frame work are two adjustable guiding. discs or plates 13 and 14 adapted to guide or limit the transverse spread of t-hespray and so determine or regulate the width of the line to be marked. These disks or plates 13 and 14. are mounted on adjustable spindles 13 and 14; which spindles and plates may be moved or adjusted independently. The reservoir or container 16'is made of sheet iron or any other suitable material and is fitted with retaining strip 17 combination filler cap and nonreturn valve 18 and spraying nozzle 19.

Any suitable type of spraying nozzle may be fitted to this machine. In Figure 4 which is a detail of the spraying nozzle, 20 is the tube through which the marking liquid is forced.

The disc 21 in Figures 4: and?) is provided wit-h obliquely drilled holes, 22 so that centrifugal motion is imparted to the marking liquid before it issues from the nozzle in the form of an even spray.

The nozzle cap 23 is screwed to the end of tube 20 and is provided with a small orifice 24. This spraying nozzle is also fitted with a regulating plug cook 25. In Figures 1 and 2 .my hand.

and nonreturn valve is screwed. This cap is provided with a standard bicyclevalve as shown at 81. c

Now the operation of this invention is'as follows 2% p A solution of lime and water or any other suitable marking liquid is poured into. the reservoir or container 16 by removing combination filler cap and nonreturn valve 18.. The cap is then replaced and air pumped into the containerthrough the non return valve 31 until a suitable pressure is att? ined. The marker is then placed in position where a line is required to be marked,

then by moving the operating bar 27, the regulating plug cook 25 is opened, and the compressed air in the container 16 now forces the marking liquid through the perforated bend 32 along the nozzle pipe 20 emerging through the orifice 2 1' in an even spray. This spray may be regulated by means of the plug cook 25 or by increasing or decreasing the area of the orifice 24. The width of the line required may also be regulated by the width of the orifice 24 and the position or set of the adjust-able guiding discs or plates 13 and 14.

Fitted to the reservoirsupport 7 Figures 1 and 2 is a tilting screw 33, by operating which the reservoir or container 16 is raised or low-. ered andas the reservoir support 8 acts as av fulcrum, the orifice 24: is either raised or low-. 'ered which may be necessary owing to the uneven surface ofthe ground to be marked. .1 claim r An improved line marker for tennis courts comprising a reservoir, an am'bulent frame on which the reservoir is mounted for tilting movement, a discharge nozzle for the reservoir, a pair of spaced discs between which said nozzle is arranged and a screw on'said frame bearing under and arranged to tiltably adjust said reservoir with respect to the frame.

In'testimony whereof I have hereunto set T JOHN MoGAIN. v 

